AMD Radeon R9 280X vs AMD Radeon RX 6900 XT

VS

AMD Radeon R9 280X

AMD Radeon RX 6900 XT

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280X and 16GB VRAM Radeon RX 6900 XT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 280X 's Advantages

Lower TDP (250W vs 300W)

AMD Radeon RX 6900 XT 's Advantages

Released 7 years late

Boost Clock has increased by 125% (2250MHz vs 1000MHz)

More VRAM (16GB vs 3GB)

Larger VRAM bandwidth (512.0GB/s vs 288.0GB/s)

3072 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R9 280X

4.096 TFLOPS

Radeon RX 6900 XT +462%

23.04 TFLOPS

3DMark Time Spy

Radeon R9 280X

2348

Radeon RX 6900 XT +791%

20932

Radeon R9 280X

VS

Radeon RX 6900 XT

Graphics Card

Oct 2013

Release Date

Oct 2020

Volcanic Islands

Generation

Navi II

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 4.0 x16

Clock Speeds

850 MHz

Base Clock

1825 MHz

1000 MHz

Boost Clock

2250 MHz

1500 MHz

Memory Clock

2000 MHz

Memory

3GB

Memory Size

16GB

GDDR5

Memory Type

GDDR6

384bit

Memory Bus

256bit

288.0GB/s

Bandwidth

512.0GB/s

Render Config

32

Compute Units

80

-

2048

Shading Units

5120

128

TMUs

320

32

ROPs

128

-

RT Cores

80

16 KB (per CU)

L1 Cache

128 KB per Array

768 KB

L2 Cache

4 MB

-

L3 Cache

128 MB

Theoretical Performance

32.00 GPixel/s

Pixel Rate

288.0 GPixel/s

128.0 GTexel/s

Texture Rate

720.0 GTexel/s

-

FP16 (half)

46.08 TFLOPS

4.096 TFLOPS

FP32 (float)

23.04 TFLOPS

1024 GFLOPS

FP64 (double)

1440 GFLOPS

Board Design

250W

TDP

300W

600 W

Suggested PSU

700 W

2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2

Outputs

1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C

1x 6-pin + 1x 8-pin

Power Connectors

2x 8-pin

Graphics Processor

Tahiti

GPU Name

Navi 21

Tahiti XTL (215-0821065)

GPU Variant

Navi 21 XTX (215-121000167)

GCN 1.0

Architecture

RDNA 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

7 nm

4.313 billion

Transistors

26.8 billion

352 mm²

Die Size

520 mm²

Graphics Features

12 (11_1)

DirectX

12 Ultimate (12_2)

4.6

OpenGL

4.6

1.2

OpenCL

2.1

1.2

Vulkan

1.3

-

5.1

Shader Model

6.5

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